can you please tell me that, what is your exact problem.
sound works in headphone and does'nt works in normal speaker.
if this was you problem then make sure that your sound setting is adjust correctly.
to check sound setting go to control panel--click on sounds--adjust sound volume
in control panel there will a addition sound setting ( like : - realtek, ALC100 or some like that )
try to restore default settings.
hope it will works.
Thanks & regards